Letter opener



FIG. 1 is a perspective view of a letter opener showing my new design from the left side and rear;

FIG. 2 is a left side elevational view thereof on a smaller scale, the right side being a mirror image thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof; and,

FIG. 5 is a bottom plan view thereof, the top being identical thereto. 

The ornamental design for a letter opener, as shown and described. 